<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component{
            state={
                username:"loading",
                password:""
            }
            render(){
                const {username}=this.state;
                return <form>
                <p>请输入用户名</p>  
                <input type="text" value={username} onChange={this.changeInput("username")}/>  
                </form>
            }
            changeInput=(name)=>{
                console.log(name);
                return (e)=>{
                    this.setState({
                        [name]:e.target.value
                    })
                }
            }
        }
        ReactDOM.createRoot(document.getElementById("app")).render(<App />);
    </script>
</body>
</html>